package com.sky.service.impl;

import cn.hutool.http.HttpUtil;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * TODO
 *
 * @Author mr.zhao
 * @Date 2025/5/24 16:23
 */
@Service
public class UserServiceImpl implements UserService {

	//微信服务接口地址
	public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

	@Autowired
	private WeChatProperties weChatProperties;

	@Autowired
	private UserMapper userMapper;
	/**
	 * 微信登录
	 *
	 * @param dto
	 * @return
	 */
	@Override
	public User login(UserLoginDTO dto) {
		String operId = getOperId(dto.getCode());

		//判断openId是否为空,如果为空表示登录失败,抛出业务异常
		if (operId ==null){
			throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
		}

		//判断当亲用户是否是新用户
		User user = userMapper.getByOpenid(operId);

		//如果是新用户,自动完成注册
		if (user == null) {
			user = User.builder()
					.openid(operId)
					.createTime(LocalDateTime.now())
					.build();
			userMapper.insert(user);
		}
		return user;
	}

	/**\
	 * 调用微信接口服务,获取微信用户的openId
	 * @param code
	 * @return
	 */
	private String getOperId(String code){
		//调用微信接口服务,获得当前微信用户的openId
		Map<String, Object> map = new HashMap<>();
		map.put("appid",weChatProperties.getAppid());
		map.put("secret",weChatProperties.getSecret());
		map.put("js_code",code);
		map.put("grant_type","authorization_code");
		String json = HttpUtil.get(WX_LOGIN, map);

		JSONObject jsonObject = JSON.parseObject(json);
		String openid = jsonObject.getString("openid");
		return openid;
	}
}
